This comment (https://news.ycombinator.com/item?id=19435419), states that according to NZ law, the video was "born illegal." [1]
[1] term inspired by https://en.wikipedia.org/wiki/Born_secret
Similarly if someone murders someone it's a crime when the event happens, even if it is not found out until later.
In all cases ignorance of the law is not a defence.
And if someone does this from another country then most countries have extradition treaties in place.
I live in the USA. Barring a few very specific categories I'm allowed to post almost anything. At worst I can get sued for refusing to take it down.
> And if someone does this from another country then most countries have extradition treaties in place.
What? I can violate all the New Zealand laws I like. I live in a sovereign nation very far away.